Muffler.



E. TROIKE.

MUFFLER. APPLICATION nuau MAR. 25. 1914.

1,1 37,554. Patented Apr. 27, 1915.

THE NORRIS PETERS cm, PHOTDJJTHOH WASHING WM. 0. C

To all whom it may concern:

UNITED STATES" PATENT OFFICE.

ERNST TROIKE, OF SANDUSKY, OHIO.

MUFFLER.

Be it known that I, ERNST Tnoixn, a citizen of the United States, residing at Sandusky, in the county of Erie and State of Ohio, have invented certain new and useful Improvements in Mufflers, of which the following is a specification.

United States Letters Patent No. 990,686, issued April 25, 1911, covers a simple con struction of muffler adapted for use in connection withautomobile, marine, and similar xplosive engines.

The object in view of my present invention has been to cheapen the manufacture of the aforesaid muliler even to a greater extent than afforded by the construction of said patent.

As hereinafter set forth I have improved primarily upon the formation of one of the heads of the mufller and altered the construction of one of the concentric cylinders or shells whereby I secure a comparatively large outlet for the exhaust gases without using the somewhat expensive form of exliaust head utilized in my previously patented construction.

A full understanding of the invention and the merits thereof will be had upon reference to the following description and to the accompanying drawings, in which:

Figure 1 is a view partly in elevation and partly in section showing my improved muffler construction. Fig.2 is a sectional view taken on the line 2-2 of Fig. 1, and Fig. 3 is an end elevation.

It may be noted that in its general features of construction the mufiier of this invention is very similar to that of the above identified patent comprising as it does the opposite heads 1 and 2 between which are arranged two concentric shells 3 and 4. The inner faces of the heads 2 are provided with grooves in which the opposite ends of the shells 3 and 4 are seated whereby to center and interlock the said shells with respect to the heads. WVithin shell 4 and also concentrio in respect thereto is an exhaust pipe 5 one end of which is screwed as shown at 6 into a threaded socket on the head 1 and the other end of which passes through an open ing in the head 2 and is also threaded, as shown at 7. A union or coupling'of suitable form, designated 8, screws on the threaded portion 7 of the pipe 5 and connects said pipe with the exhaust pipe proper 9 leading from the engine, the latter not being shown.

Specification of Letters Patent. Patented Apr, 27, 1915 Application filed March 25,

1914. Serial No. 827,167.

opening 10 from which extends a socket 11' adapted to receive an outlet pipe 12, secured in the socket by means of a set screw 18. I The pipe 5 has openings 5 at the end adj acent the head 1, the shell 4 similar openings 4 adj acent to the head 2 and the shell 4.

Having in view the foregoing, it will be observed-that the exhaust gases entering the exhaust chamber provided by the pipe 5 pass from said chamber through the openings 5 into the space between the parts 4 and 5. From this space the said gases pass through the openings 4 into the narrow annular chamber between the shells 3 and 4, and out of said chamber through the opening 10 and the pipe 12.

I find in practical usage that though the size of the chamber intermediate the shells 8 and 4 is sufiicient to expeditiously dispose of the exhaust gases in mufliing, to afford a sufiiciently large outlet opening 10, 1 advantageously flatten or depress the shell 4 at the end thereof adjacent to the head 1, as shown at 4 the depression being elongated longitudinally as illustrated in Fig. 1. Without the provision of the flattened or clepressed portion 4 of the shell 4, I find it necessary either to provide a head 1 of somewhat expensive and diflicult structure or use an exhaust opening of insufficient size or disadvantageous formation both of which diliiculties are overcome by the formation of the shell 4. The groove of the head 1 in which the adjacent end of the shell 4 is seated is, of course, provided with a straight portion to. receive the extremity of the flattened or depressed part 4 of said shell.

It is to be understood, of course, that the pipe 12 may be screwed into the part 11 as an ordinary substitute mode of establishing the desired connection. The depressed portion 4 of the shell 4 obviously affords an outlet for the gases of maximum area, permits the mufiler to be made of minimum diameter and prevents liability of loss of power of the motor which is incidental to the use of ordinary muffiers where a small outlet is necessary owing to the comparatively small space between the shells.

Having thus described my invention, what I claim as new is:

An exhaust muliier for explosive engines comprising spaced heads, concentric shells between said heads, a pipe leading into the inner of the shells and spaced therefrom, said pipe and the inner shell having openings establishing communication between the spaces between the pipe and said shell, and between the shells themselves, means for supplying exhaust gases to said pipe, one of the heads being formed with an outlet. opening for said gases opposite the space between the shells, and the inner shell being formed with a portion depressed toward the adjacent pipe and inclosed thereby to permit of the provision of said outlet opening of a larger area than the normal cross sectional area of the space between said shells, the said heads being formed with grooves on their inner faces receiving the opposite ends of the shells to center and interlock the same with respect to the heads, the head having the outlet opening mentioned having one of its grooves formed with a straightened portion in which the flattened portion of the inner shell is seated whereby to provide rigid connection of the depressed portion aforesaid with its adjacent head.

In testimony whereof I atliX my signature in presence of two witnesses.

ERNST TROIKE.

"Witnesses PHILIP BUERKLE, V. B. Moon.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of l atents,

Washington, D. G.

Oil 

